commit https://github.com/vim/vim/commit/9ad73239c26467832a5b553b2a4b99d7ffbaa25e Author: Bram Moolenaar <Bram@vim.org> Date: Wed Jun 1 22:08:17 2016 +0200 patch 7.4.1865 Problem: Memory leaks in tet49. (Dominique Pelle) Solution: Use NULL instead of an empty string.

/* auto/if_perl.c */
int perl_enabled(int verbose);
void perl_end(void);
void msg_split(char_u *s, int attr);
void perl_win_free(win_T *wp);
void perl_buf_free(buf_T *bp);
void ex_perl(exarg_T *eap);
void do_perleval(char_u *str, typval_T *rettv);
void ex_perldo(exarg_T *eap);